Hub bolt rethreading and peening tool



June 1951 J. K. MCFADDEN HUB BOLT RETHREADING AND PEENING TOOL Filed Apri 1947 Patented June 19, 1951 ()FFHCE HUB BOLT RETHREADING AND PEENING TOOL John K. McFadden, Manhattan Beach, Calif.

Application April-1, 1947, Serial No. 738,678

2 Claims.

This invention relates to a hub bolt rethreading and peening tool.

It is an object of the present invention to provide a tool whereby a hub bolt may be peened into a countersunk flange by as simple an operation as turning the tool on the threaded portion of the splined bolt.

Other objects of the present invention are to provide a simple tool for effecting rethreading and peening operations upon a splined bolt, which is inexpensive to manufacture and which is efificient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Fig. 1 is a side elevational View of the tool fitted on a bolt after the peenin operation has been perfected upon the shoulder of the bolt.

Fig. 2 is a plan view looking upon the peening portion of the tool.

Fig. 3 is a cross-sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is an end elevational view looking upon the opposite end of the tool as fixed in place to put the bolt in place.

Fig. 5 is a cross-sectional view taken on line 5-5 of Fig. 4.

Fig. 6 is a similar cross-sectional view after the tool has been drawn over the threaded portion to the maximum extent and the shoulder has been peened into the countersunk flange.

Referring now to the figures, l represents a hub or flange into which there is to be extended a series of bolts II. The bolts II are provided with an arm head I2 and a splined portion I3 adapted to extend in tight engagement with the wall of the opening through which the bolt is extended. The splined portion has a shoulder I4 adapted to extend beyond the opposite side of the hub or plate II) from the rounded head portion I2. On threaded portion l of the bolt II, there is fitted a tool I6 embodying the features of the present invention. Thi tool has a threaded opening I'I extending axially therethrough for engagement with the threaded portion IS on the bolt. When the tool is applied as shown in Fig. 3, the bolt will be drawn through the opening in the plate I0 so that the rear face of the head I2 will be placed in flush engagement with the face of the plate. In order to receive the splined portion I3 the tool is provided with a recess I8 of larger diameter than the threaded openin I1. The tool IE will have 2 its forward end face'l9 engaged with the surface of the plate about the splined portion I3 and as the tool is turned the splined portion l3 will be drawn through the plate so that its end will fill the recess I8.

Thereafter the tool I6 is removed from the threaded portion I5 of the bolt and reversed so as to apply a peening forming end in engagement with the shoulder I4 as shown in Fig. 5.

Before again applying the tool I6 a countersunk flange 2| is placed over the splined portion l3. This flange has a countersunk opening 22. The peen forming projections of the tool are shown at 23 and they act upon the shoulder [4 to upset the same and cause the material to be forced into the countersunk opening 22 to form a flange 24 upon the bolt II. The diameter of the opening at the peening end of the tool is the same as that of the threads. Accordingly the bolt II will be made fast to the plate I0.

There are four different peening projections 23 on the tool I6. These projections are separated by grooves and the projections are rounded at the forward ends so that upon turnin the tool the material will be rolled into the countersunk openin 22 of the flange 2|. The bolt II will accordingly be retained in the plate II] in a rivet-like manner. The exterior diameter of the tool I6 is greater along its intermediate portion where a wrench will be applied than at the opposite ends bearing the recess l8 and the peening projections 23. The tool i of hexagonal section so that it can be operated by a standard wrench.

Upon fittin the tool onto the threaded portion l5, the bolts will be rethreaded at the same time that the tool is being used to pull the bolts through the plate ID or to upset the shoulder portion I4.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

I claim:

1. In a peaning tool for a bolt having a shank, a head at one end of the shank and a threaded portion extended from the opposite end and axially aligned with the shank, the outside diameter of said threaded portion being less than that of the shank providing a shoulder between the said threaded portion and shank, and said shank having a washer with a countersunk opening therein positioned thereon, the combination which comprises a nut having a threaded bore with flat wrench gripping areas on the outer surface and having a collar with a corrugated surface including arcuate wavy formations on the outer end carried by an end of the nut, whereby with the nut threaded on the said threaded portion of the bolt and with the shank of the bolt positioned in an opening in a plate the thickness of which is less than the length of the shank, and with the washer on the shank and positioned against the outer surface of the plate with the countersunk end of the opening extended outwardly the corrugations pean the shoulder of the bolt into the countersunk end of the opening of the washer as the nut is screwed toward the plate.

2. In a peening tool for a bolt having a splined shank portion and a threaded shank portion, the splined shank portion being larger diametrically than the threaded shank portion and greater axially than the thickness of the part through which it is to be passed whereby to provide a shoulder, said tool comprising a hollow body having an internal thread similar to that of the threaded portion of the shank and having fiat outer sides, an annular series of rel- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 240,387 Cowdy Apr. 19, 1881 759,834 Steele May 10, 1904 868,067 Berry Oct. 15, 1907 1,067,755 Price July 15, 1913 1,355,373 White Oct. 12, 1920 1,986,980 Ross Jan. 8, 1935 

